CREATE TABLE calendars (
    id SERIAL NOT NULL,
    principaluri VARCHAR(100),
    displayname VARCHAR(100),
    uri VARCHAR(100),
    ctag INTEGER NOT NULL DEFAULT 0,
    description TEXT,
    calendarorder INTEGER NOT NULL DEFAULT 0,
    calendarcolor VARCHAR(10),
    timezone TEXT,
    components VARCHAR(20)
);

ALTER TABLE ONLY calendars
    ADD CONSTRAINT calendars_pkey PRIMARY KEY (id);

CREATE UNIQUE INDEX calendars_ukey
    ON calendars USING btree (principaluri, uri);

CREATE TABLE calendarobjects (
    id SERIAL NOT NULL,
    calendarid INTEGER NOT NULL,
    calendardata TEXT,
    uri VARCHAR(100),
    lastmodified INTEGER
);

ALTER TABLE ONLY calendarobjects
    ADD CONSTRAINT calendarobjects_pkey PRIMARY KEY (id);

CREATE UNIQUE INDEX calendarobjects_ukey
    ON calendarobjects USING btree (calendarid, uri);

ALTER TABLE ONLY calendarobjects
    ADD CONSTRAINT calendarobjects_calendarid_fkey FOREIGN KEY (calendarid) REFERENCES calendars(id)
        ON DELETE CASCADE;
